Prohlížíte si archiv čtvrtek 27. srpna 1998
Report sluneční aktivity
Každá zmíněná sluneční erupce v této zprávě má škálovací faktor aplikovaný Střediskem předpovědi kosmického počasí (SWPC). Kvůli škálovacímu faktoru SWPC jsou sluneční erupce hlášeny jako o 42 % menší než u údajů o vědecké kvalitě. Z našich archivovaných dat slunečních erupcí byl odstraněn faktor měřítka, aby odrážel skutečné fyzikální jednotky.
Zpráva o sluneční-geofyzikální činnosti 1998 Aug 27 2200 UTC
Připraveno NOAA © SWPC a zpracováno SpaceWeatherLive.comSpolečná zpráva USAF / NOAA o sluneční a geofyzikální činnosti
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SDF číslo 239 Vydáno za 2200Z za 27 AUG 1998
IA. Analýza solárních aktivních oblastí a aktivity od 26-2100Z do 27-2100Z
SOLAR ACTIVITY HAS BEEN LOW. THE ONLY ACTIVITY
HAS BEEN A C-CLASS X-RAY BURSTS AND SUBFLARES FROM REGIONS 8307
(N31W28) AND 8319 (N21W03). REGION 8307 CONTINUES ITS SLOW DECAY
AND SIMPLIFICATION. FILAMENT ACTIVITY WITHIN THE REGION HAS
DECREASED. REGION 8319 (N19W03) HAS CONTINUED TO GROW AND DEVELOP.
IT IS STILL SIMPLE AND SMALL IN SPOT AREA, BUT THE PLAGE AREA HAS
GROWN. SUBFLARES AND ARCH FILAMENT SYSTEMS INDICATE THE REGION IS
STILL EMERGING. THE REGION IS CLOSE TO OLDER REGION 8314 (N16E03)
AND IF DEVELOPMENT CONTINUES IN 8319, THE MERGER OF THE REGIONS MAY
PRODUCE ACTIVITY AS A RESULT OF THEIR INTERACTION.
IB. Předpověď sluneční aktivity
SOLAR ACTIVITY IS EXPECTED TO BE
LOW TO MODERATE. A SPORADIC CLASS M FLARE IS POSSIBLE FROM REGION
8307. THE DEVELOPING COMPLEX OF REGIONS 8314/8319 IS LIKELY TO
PRODUCE FREQUENT SMALL FLARES WITH A LIKELIHOOD OF STRONGER ACTIVITY
OVER THE NEXT SEVERAL DAYS.
IIA. Souhrn geofyzikální aktivity 26-2100Z až 27-2100Z
THE GEOMAGNETIC FIELD HAS BEEN AT UNSETTLED TO SEVERE STORM LEVELS.
MID-LATITUDE K-INDICES REACHED 7 AND 8 BETWEEN 27/0300 UT AND
27/1200 UT. THE FORBUSH DECREASE THAT BEGAN LATE ON 25 AUGUST
CONTINUES, WITH NEUTRON MONITOR COUNTING RATES FROM THULE DEPRESSED
BY ABOUT 6 PERCENT TODAY. ACE REAL-TIME SOLAR WIND DATA HAS
PROVIDED CONTINUOUS INFORMATION THROUGH THE PERIOD OF THE
GEOMAGNETIC STORM. FROM 26/0600 UT THROUGH 26/2200 UT, THE
ESTIMATED SOLAR WIND VELOCITY INCREASED STEADILY FROM ABOUT 400 KM/S
TO APPROXIMATELY 900 KM/S, THEN DECLINED JUST AS STEADILY TO ABOUT
600 KM/S BY 27/0900 UT. AT THE SAME TIME, THE DENSITY REMAINED LESS
THAN 10 /CM3 AND THE TEMPERATURE INCREASED FROM 500,000 K UP TO
1,000,000 K AT 26/2100 UT, THEN DOWN TO 20,000 AT 27/1300 UT. THE
RESULT APPEARED TO BE A FAST, HOT, LOW-DENSITY STREAM. THE
INTERPLANETARY BZ FIELD HAS REMAINED NEARLY FLAT AT ABOUT -10 TO -15
NANOTESLA MOST OF TODAY, BUT HAS SHOWN SIGNS OF MOVING TOWARD LESS
NEGATIVE VALUES OVER THE PAST 6 HOURS. THE GREATER THAN 10 MEV
PROTON FLUXES HAVE REMAINED ABOVE EVENT THRESHOLDS THROUGHOUT 27
AUGUST. THE GREATER THAN 100 MEV PROTON EVENT WAS DECLARED OVER AT
26/2050 UT. ENERGETIC ELECTRONS FLUXES GREATER THAN 2 MEV, AS
MEASURED BY THE GOES SATELLITE AT GEOSYNCHRONOUS ORBIT, HAD
DECREASED TO ABOUT 10 PFU EARLY ON 27 AUG AFTER PREVIOUSLY REACHING
NEAR THE SEC ALERT THRESHOLD OF 1000 PFU ON PREVIOUS DAYS. SINCE
27/0900 UT, THE FLUXES HAVE BEEN INCREASING.
IIB. Předpověď geofyzikální aktivity
GEOMAGNETIC ACTIVITY IS
EXPECTED TO CONTINUE AT MINOR TO MAJOR STORM LEVELS BUT WITH
DECLINING INTENSITY OVER THE NEXT 24 HOURS, REACHING ACTIVE TO MINOR
STORM LEVELS BY THE END OF THE DAY TOMORROW. MID-LATITUDE K-INDICES
ARE MOST LIKELY TO REACH VALUES OF 6 OR 7 DURING THE COMING WESTERN
HEMISPHERE NIGHT TIME. ENERGETIC ELECTRON FLUXES GREATER THAN 2 MEV
WILL REACH ALERT LEVELS BY THE TIME THIS FORECAST IS EFFECTIVE. THE GREATER
THAN 10 MEV PROTON FLUXES ARE LIKELY TO CONTINUE THEIR SLOW DECLINE
BUT REMAIN ABOVE EVENT THRESHOLDS WELL INTO 27 AUGUST. THE CURRENT
FORBUSH DECREASE IS EXPECT TO CONTINUE TO DECLINE IN INTENSITY.
III. Pravděpodobnosti události 28 AUG až 30 $ 4
Třída M | 25% | 25% | 25% |
Třída X | 10% | 10% | 10% |
Proton | 25% | 25% | 25% |
PCAF | GREEN
|
IV. Proud Penticton 10.7 cm
Pozorováno 27 AUG 135
Předpovězeno 28 AUG-30 AUG 135/135/135
90 denní průměr 27 AUG 117
V. Geomagnetické indexy A
OBSERVED AFR/AP 26 AUG 028/039
ESTIMATED AFR/AP 27 AUG 084/107
PREDICTED AFR/AP 28 AUG-30 AUG 030/030-010/015-010/010
VI. Pravděpodobnosti geomagnetické aktivity 28 AUG až 30 AUG
A. Střední zeměpisné šířky |
Aktivní | 30% | 40% | 40% |
Menší bouře | 30% | 10% | 10% |
Silná bouře | 20% | 05% | 05% |
B. Vysoké zeměpisné šířky |
Aktivní | 30% | 40% | 40% |
Menší bouře | 40% | 10% | 10% |
Silná bouře | 15% | 05% | 05% |
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